Extrusion type coating system of power lithium battery base band

Abstract

The invention discloses an extrusion type coating system of a power lithium battery base band. The extrusion type coating system of the power lithium battery base band comprises an unwinding mechanism, a feeding device, a machine head coating device, a tension control device, a drying heating device, a tail deviation rectifying device and a winding mechanism. The unwinding mechanism releases the base band at a constant speed. The feeding device provides a stable sizing agent. The machine head coating device disperses the sizing agent to be uniform and discharges and coats the sizing agent to the base band along the position of a gap of an outlet of an extrusion mold head. The drying heating device dries the wet sizing agent coated to the base band. The winding mechanism winds the coated and dried base band. The tail deviation rectifying device can guarantee that the base band is tidy during taking up, operation of following working procedures is facilitated, and the tension control device can guarantee the best tension degree of the base band.

Description

technical field [0001] The invention relates to a power lithium battery baseband extrusion coating system, which belongs to the field of lithium battery production equipment. Background technique [0002] Lithium-ion batteries have outstanding advantages such as high voltage, small size, light weight, high specific energy, no memory effect, no pollution, small self-discharge, and long service life. With the shortage of energy and the enhancement of people's awareness of environmental protection, lithium-ion battery manufacturers have invested a lot of money and R&D personnel to develop large-capacity power lithium-ion batteries because of their advantages in many aspects. This type of battery is a high-performance, pollution-free new environmentally friendly energy source, and can be widely used in electric bicycles, electric tools, electric motorcycles, hybrid vehicles, industrial batteries and other fields. [0003] The main production process of power lithium battery is:...

AI Technical Summary

Problems solved by technology

The slurry of the transfer coating machine is completely exposed to the air. Even if it is used to seal the trough, it is only a shielded relative seal, and the slurry on the coating roller cannot be sealed, so the slurry is very easy to absorb in the air. The moisture and impurities in the slurry will cause the slurry to deteriorate, precipitate, and change in viscosity, and its coating consistency cannot be guaranteed.

[0008] (2) The material at the scraper edge of the transfer coating is very easy to absorb and agglomerate to form particles, causing coating scratches, and in severe cases, the overall weight will be light

However, transfer coating is difficult to achieve the above two coating processes. Even if the coating process is realized by "scraping material", it is far inferior to extrusion coating in terms of precision control and difficulty of process size replacement.

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